Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Onde ele terminou quando começou em 21.6?
 ###Tabelas: CREATE TABLE current_member_schools (current_member_schools_id AUTO_INCREMENT PRIMARY KEY, School VARCHAR, Location VARCHAR, Enrolment INT, Founded INT, Denomination VARCHAR, Boys/Girls VARCHAR, Day/Boarding VARCHAR, Year Entered Competition INT) CREATE TABLE wisconsin_counties_ranked_by_per_capita_income (wisconsin_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE diversity_of_new_york_city's_boroughs (diversity_of_new_york_city's_boroughs_id AUTO_INCREMENT PRIMARY KEY, Borough VARCHAR, 1970 INT, 1980 INT, 1990 INT, 2000 INT, 2006 INT) CREATE TABLE indian_astrology (indian_astrology_id AUTO_INCREMENT PRIMARY KEY, Day VARCHAR, Sunday Surya (the Sun) VARCHAR, Monday Soma (the Moon) VARCHAR, Tuesday Mangala (Mars) VARCHAR, Wednesday Budha (Mercury) VARCHAR, Thursday Guru (Jupiter) VARCHAR, Friday Shukra (Venus) VARCHAR, Saturday Shani (Saturn) VARCHAR) CREATE TABLE career_nascar_statistics (career_nascar_statistics_id AUTO_INCREMENT PRIMARY KEY, Year INT, Races INT, Wins INT, Poles INT, Top 5 INT, Top 10 INT, DNF INT, Finish VARCHAR, Start VARCHAR, Winnings VARCHAR, Season Rank VARCHAR, Team(s) VARCHAR)  
SELECT COUNT Finish FROM career_nascar_statistics WHERE Start = 21.6